# deduction guides for `std::ranges::iota_view`

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< cpp‎ | ranges‎ | iota view

Defined in header `<ranges>` |  |
template< class W, class Bound > requires (!/*is-integer-like*/<W> || !/*is-integer-like*/<Bound> || /*is-signed-integer-like*/<W> == /*is-signed-integer-like*/<Bound>) iota_view( W, Bound ) -> iota_view<W, Bound>; |  | (since C++20)

This deduction guide is provided for `iota_view` to allow deduction from an initial value and a bounding value.

For the definitions of /*is-integer-like*/ and /*is-signed-integer-like*/, see `is-integer-like`﻿.

Note that the guide protects itself against bugs arising from sign mismatch, like views::iota(0, v.size()), where ​0​ is signed and v.size() is unsigned.

### Example

Run this code

    #include <cassert>
    #include <ranges>

    int main()
    {
        auto io = std::ranges::iota_view(1L, 7L); // deduces W and Bound as “long”
        assert(io.front() == 1L and io.back() == 6L);
    }

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